1/x-1/y=1/z, then z is equal to:
If the circumference and the area of a circle are numerically equal then the numeri-cal value of the diameter is:
If p = 8, q = 3 and r = -2, then the value of 2pq−7qr/pq+4pr is:
A merchant sold a radio of cost Rs. 70 at the price of Rs. 98. The profit is:
The values of x and y if x– y = 9; 3x+ 2y = 2 are respectively,
A mother is 22 years older than her son. If after 3 years the mother’s age will bthree times that of her son, the son’s age at present will be: